丙烷脱氢反应过程的研究Ⅱ.石英空管反应器中氧的影响  

Dehydrogenation of Propane Ⅱ. Effects of Oxygen in Flow Tubular Quartz Reactor

作　　者：林少波[1] 曹冬冬[1] 方锋猛 隋志军[1] 朱贻安[1] 李平[1] 

机构地区：[1]华东理工大学化学工程联合国家重点实验室,上海200237

出　　处：《石油化工》2015年第7期815-821,共7页Petrochemical Technology

基　　金：国家高技术研究发展计划项目(2012AA040306);国家自然科学基金项目(21276077;21376076);中央高校基本科研业务费专项资金项目(WG1213011;222201313006)

摘　　要：采用石英空管反应器,在350~700℃内,测定了不同氧加入量（氧气与原料的摩尔比分别为1∶8,1∶4,1∶2,1∶1）下丙烷及丙烯的热解转化率和产物分布,并与无氧条件下的热解结果进行了对比。实验结果表明,氧可促进丙烷在更低温度下进行反应,丙烷的转化率和产物生成量均随氧加入量的增加而提高;温度和氧加入量对丙烷热解产物分布影响较大,高温和高氧加入量下CO是最主要的产物;适量的氧存在可提高丙烯的选择性和收率,并在适宜温度下获得极值（分别为47.7%和14.7%）。含氧气氛中丙烯仍具有较高的稳定性,氧对丙烯热解的促进作用不强,其CO生成量远低于丙烷氧化热解体系。The pyrolysis of C3H8 and C3H6 with different addition of O2 in the temperature range of 350-700 ℃ was investigated in a flow tubular quartz reactor separately,and the results were compared with the corresponding results obtained in the absence of O2. The addition of O2 could promote the C3H8 pyrolysis significantly at low temperature and the product distribution highly depended on the O2 concentration and temperature. And CO was the major product at high temperature and high O2 concentration. The selectivity and yield of C3H6 in the C3H8 pyrolysis were improved due to the presence of O2 even at relatively low temperature,and reached the peak values at appropriate temperature（47.7% and 14.7%,respectively）. C3H6 was stable in O2 atmosphere to a certain extent. The generated CO in the C3H6 pyrolysis was far less than that generated in the C3H8 pyrolysis under the same conditions of temperature and O2 concentration.

关 键 词：丙烷 丙烯 氧化 脱氢 热解 石英反应器 

分 类 号：TQ221.212[化学工程—有机化工]